Link for sprinkler-heads.



IL. A. mMEsL LINK FOR SPRINKLER HEADS. APPLICATION FILED )DLY 5. i916- Patented 10% 19, lg'.

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LESTER a. canalis, or cannes, naw :maar i'.

LINK FOB, SPRINKLER-HEBJJE.

Application lleil July 5, 191.6.

More definitely stated, the primary objectl of this invention is to simplify, cheapen and correspondingly increase the elliciency and relial'bility of links of this character, each link including a pair of duplicate plates normally held rigidly together by means of fusible metal.

With the foregoing and other objects in. 'view the invention consists in the arrange ment and combination of -parts hereinafter described and claimed, and while the invention is not restricted to the exactA details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thcreotreference is had to the accompanying drawings, in which-like reference characters designate the`same parts in the several vie-ws, and in which- Figurel is a front elevation of a standard form of sprinkler head having my improved `link in connection therewith; Fig. .2 is a vertical sectionalv view of the sameon the line 2 2; Fig. 3 is an enlarged vertical sectional detail showing the link assembled-for the purpose of resisting maximum strain; Fig. 4 is a perspective vien/.of one of the plates; and Fig. 5 is a view of the same character as Fig. 3, but showing the plates assembled so-as to resist less strain than in Fig. 3.

This invention comprises alink consisting of two parts or 'plates preferably made as duplicates for the sake of cheapness of construction and reliability oli assemblage and adapted to he secured together by Jfusible metal indicated at 10. Each plate is prefern ably of the form shown in Fig. il, being pro vided Witlra hole ll. at one end and a cutmy away 1Q at the other end. therwise the plate is imperforate throughout. rlhe main. portion of the plate is tlat, but is so formed. at different points as to include a plurality of depressions forming a Vlike number of lugs or projections on the opposite side., the

metal throughout the plate and the severalJ Specification of Letters Patent.

patented Dec. lll, lele.

vdepressed portions being practically ci uniform thickness. lwo ol' these depressions are formed at the end on opposite sides oit the eye ll, thereby producing lugs i3, which in the preferred manner of assemblage are adapted to project into sockets la on oppo site sides of the cutaway l2 oli the other plate. rlhese projections 13 and coperating 'sockets ll ot' the two connected plates may be regarded centering devices, while adjacent' the center oit each plate are formedy opposait-ely directed sockets l5 and 16, pro ducing projections l? and 18, the socketl ot' each plate being adapted to receive the projection 18 of the other plate when asselnbled as shown in l? 3, while as indicated in Fig. 5. the plates may be assembled so that the depression 16 of either plat/e will receive the projection 1.7 of the other. rlfnese sockets or depri sions and the correspond ing projections are indicated as of the form of spherical segments and they are so formed also .that the plates may be assem bled in either way, as shown in Fig. 3 or Fin'. The cooperating sockets and projections in either case,however,piovidethat the flat portions ot the plates are sufficiently spaced. t'roni each. other to receive a layer of Afusible racial lli. @aid fusible metal in practicey is extcnllcrl all the way around the joint or meeting line between adjacent plates, but the metal does not lie between the cooperating' curved portions of the plates.

la further comparaison ot' Figs. 3 and 5, it will lic noted that in the. preferred manner ol a: enihlage olf lli il.; the tension or strain ainnhed to the cvev portions of the plates, tendini;f to more thcni apart, will be resisted, so tar as direct contact between the middle or' the two plates eonccrned7 by about dou-` ille the amount of o'll'set. lo other words, to cause. the separation ont the two plates, the rest ot each projection 'i8 must glide lrom the bottoni of its socket l5 up and over the si'znilar crest of the other plate, whereas in Fig. 5, similar separation would be e'll'ected simply by 'the gliding' ol the one plate over the other far enough lor 'the crest of one projection l'l' to draw ont of its socket lll. Under certain conditions, the arrangement of Fig. is 'prelerableto :that ol? Fig. while in other speeilicaliions or under other conditions, the arrangement of Fig. 5 may' be preferred. lu either event, the linlr plates are customarily stamped on their outer faces to indicate the date ot asseml. ll

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blage oi the link or the melting point of its solder, so that it is impossible for the link plates to be erroneously assembled.

With the foregoing specific description of* the link, its manner of 'operation may be briefly set forth in connection with the diagrams of Figs. 1 and 2. The sprinkler head generated to melt the solder or fusible metal 10. When the solder begins to melt, the cooperation of the crests and sockets. at the center of the link will cause the links to separate with a combined sliding and bodily As will be plainly seen from Figs. 3 and 5, the interlocking portions at the center of the plates provided by the continuous compound curves lie in direct contactwith each other. liny other words, the el'ect of the solder between the flat portions of these plates is that of holding the two plates .from bodily separation, and therefore the strain to which the link is ordinarily subjected, tending to part the plates with aV gliding movement one over 'the other, is directly resisted by the coperl lating projections 18 and 18 abutting directly Laddove against each other, as shown in Fig. 3. It

is well known in thisart that the constant kler head. It will be appreciated therefore l that witlnthe two projections 18 and 18 in direct conta'ct, theV tendency for lthe plates to slip or creep one over 'the other will be resisted by the 'hard metal of the plates, rather than by the soft solder surrounding the'interlocking features. rIhe saine principle ap plies also to Fig.v 5, but in the latter gure, the plates will separate more easily than in Fig. 3.

I claim:

In a link for automatic sprinkler heads,

the combination of a pair of duplicate plates substantially flat throughout their main portions, each provided with projections and sockets of the form of heini-spherical segments, one of said sockets merging into an adjacent projection in a continuous compound curve, all of the compound curved surface of one plate fitting directly against a similar surface of the other plate, and fusible j metal connecting theflat portion of one plate to the flat portion of the other.

' LESTER A. GRXMES. 

